JPS5538693A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS5538693A JPS5538693A JP11332078A JP11332078A JPS5538693A JP S5538693 A JPS5538693 A JP S5538693A JP 11332078 A JP11332078 A JP 11332078A JP 11332078 A JP11332078 A JP 11332078A JP S5538693 A JPS5538693 A JP S5538693A
- Authority
- JP
- Japan
- Prior art keywords
- binder
- molecular weight
- ferromagnetic powder
- recording medium
- diol
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Magnetic Record Carriers (AREA)
- Paints Or Removers (AREA)
Abstract
PURPOSE: To improve both resistance to wear and electromagnetic conversion characteristics by specific polyurethane as a binder for ferromagnetic powder.
CONSTITUTION: A multifunction hydroxy compound of 500W3000 in molecular weight such as polyester polyol, short chain diol of less than 500 in molecular weight such as 1,4-butanediol, a 2 or 3-functional isocyanate compound such as 4,4- diphenylmethane diisocyanate, and diol expressed by formula I or II (R1 is alkylene of C2-6; R2 is alkyl of C1-5, H; R3 is organic remaining radical; M is alkaline metals; [m] is between 1W3) are heated to react under the reflux of appropriate solvent. In this way, polyurethane whose SO3M radical content is an equivalent of 0.005W2.0m per polymer is used as a binder to obtain magnetic paint with dispersed ferromagnetic powder, and a non-magnetic supporting material is coated with it.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11332078A JPS5538693A (en) | 1978-09-13 | 1978-09-13 | Magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11332078A JPS5538693A (en) | 1978-09-13 | 1978-09-13 | Magnetic recording medium |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5538693A true JPS5538693A (en) | 1980-03-18 |
JPS6118809B2 JPS6118809B2 (en) | 1986-05-14 |
Family
ID=14609236
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11332078A Granted JPS5538693A (en) | 1978-09-13 | 1978-09-13 | Magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5538693A (en) |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56167770A (en) * | 1980-05-29 | 1981-12-23 | Matsushita Electric Ind Co Ltd | Preparation of magnetic paint |
JPS56167771A (en) * | 1980-05-29 | 1981-12-23 | Matsushita Electric Ind Co Ltd | Preparation of magnetic paint |
JPS56167769A (en) * | 1980-05-29 | 1981-12-23 | Matsushita Electric Ind Co Ltd | Preparation of magnetic paint |
JPS56167768A (en) * | 1980-05-29 | 1981-12-23 | Matsushita Electric Ind Co Ltd | Preparation of magnetic paint |
JPS56167772A (en) * | 1980-05-29 | 1981-12-23 | Matsushita Electric Ind Co Ltd | Preparation of magnetic paint |
JPS5740743A (en) * | 1980-08-23 | 1982-03-06 | Sony Corp | Magnetic recording medium |
JPS5744227A (en) * | 1980-08-30 | 1982-03-12 | Sony Corp | Magnetic recording medium |
JPS5792422A (en) * | 1980-11-25 | 1982-06-09 | Sony Corp | Magnetic recording medium |
JPS57113420A (en) * | 1980-12-29 | 1982-07-14 | Sony Corp | Magnetic recording medium |
JPS57158016A (en) * | 1981-03-20 | 1982-09-29 | Hitachi Maxell Ltd | Magnetic recording medium |
WO1983000696A1 (en) * | 1981-08-19 | 1983-03-03 | Miyai, Seiichi | Electron beam-curable resin |
JPS5891524A (en) * | 1981-11-24 | 1983-05-31 | Hitachi Maxell Ltd | Magnetic recording medium |
JPS58115629A (en) * | 1981-12-28 | 1983-07-09 | Fuji Photo Film Co Ltd | Magnetic recording medium |
JPS6015473A (en) * | 1983-07-06 | 1985-01-26 | Toyo Tire & Rubber Co Ltd | Magnetic paint |
JPS6195531A (en) * | 1984-10-16 | 1986-05-14 | Meidensha Electric Mfg Co Ltd | Forming method of bevel structure of semiconductor element |
US7514139B2 (en) * | 2002-04-30 | 2009-04-07 | Sanyo Chemical Industries, Ltd. | Polyol component for polyurethane formation comprising anionic diol and composition |
-
1978
- 1978-09-13 JP JP11332078A patent/JPS5538693A/en active Granted
Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56167771A (en) * | 1980-05-29 | 1981-12-23 | Matsushita Electric Ind Co Ltd | Preparation of magnetic paint |
JPS56167769A (en) * | 1980-05-29 | 1981-12-23 | Matsushita Electric Ind Co Ltd | Preparation of magnetic paint |
JPS56167768A (en) * | 1980-05-29 | 1981-12-23 | Matsushita Electric Ind Co Ltd | Preparation of magnetic paint |
JPS56167772A (en) * | 1980-05-29 | 1981-12-23 | Matsushita Electric Ind Co Ltd | Preparation of magnetic paint |
JPS56167770A (en) * | 1980-05-29 | 1981-12-23 | Matsushita Electric Ind Co Ltd | Preparation of magnetic paint |
JPS5740743A (en) * | 1980-08-23 | 1982-03-06 | Sony Corp | Magnetic recording medium |
JPS6346489B2 (en) * | 1980-08-23 | 1988-09-16 | Sony Corp | |
JPS639296B2 (en) * | 1980-08-30 | 1988-02-26 | Sony Corp | |
JPS5744227A (en) * | 1980-08-30 | 1982-03-12 | Sony Corp | Magnetic recording medium |
JPS5792422A (en) * | 1980-11-25 | 1982-06-09 | Sony Corp | Magnetic recording medium |
JPS6346886B2 (en) * | 1980-11-25 | 1988-09-19 | Sony Corp | |
JPS6346887B2 (en) * | 1980-12-29 | 1988-09-19 | Sony Corp | |
JPS57113420A (en) * | 1980-12-29 | 1982-07-14 | Sony Corp | Magnetic recording medium |
JPS57158016A (en) * | 1981-03-20 | 1982-09-29 | Hitachi Maxell Ltd | Magnetic recording medium |
JPH0370286B2 (en) * | 1981-03-20 | 1991-11-07 | Hitachi Maxell | |
WO1983000696A1 (en) * | 1981-08-19 | 1983-03-03 | Miyai, Seiichi | Electron beam-curable resin |
JPS5891524A (en) * | 1981-11-24 | 1983-05-31 | Hitachi Maxell Ltd | Magnetic recording medium |
JPH0449168B2 (en) * | 1981-11-24 | 1992-08-10 | Hitachi Maxell | |
JPS58115629A (en) * | 1981-12-28 | 1983-07-09 | Fuji Photo Film Co Ltd | Magnetic recording medium |
JPH036571B2 (en) * | 1981-12-28 | 1991-01-30 | Fuji Photo Film Co Ltd | |
JPS6015473A (en) * | 1983-07-06 | 1985-01-26 | Toyo Tire & Rubber Co Ltd | Magnetic paint |
JPS6358870B2 (en) * | 1983-07-06 | 1988-11-17 | ||
JPS6195531A (en) * | 1984-10-16 | 1986-05-14 | Meidensha Electric Mfg Co Ltd | Forming method of bevel structure of semiconductor element |
US7514139B2 (en) * | 2002-04-30 | 2009-04-07 | Sanyo Chemical Industries, Ltd. | Polyol component for polyurethane formation comprising anionic diol and composition |
Also Published As
Publication number | Publication date |
---|---|
JPS6118809B2 (en) | 1986-05-14 |
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